Can you find out the missing number in the grid?

The LCD device should be able to tell the right time in the format HH:MM: SS in a 12-hour format. You can refer to the picture to get an idea. The device is a simple "level indicator" which has to be converted into a watch. How will you program it to work?

This puzzle is for Harry Potter fans. Do you know why Tom Riddle is called Lord Voldemort?

What does this rebus photo means?

You can see it everyday, But cannot touch it at will. What is it?

A boy purchased a book from a bookkeeper and gave him $100.
The cost of the book is $50 but the bookkeeper has no change, so he gets the change from the next shop and returns the boy his $50.

After some time the next shopkeeper came with the $100 note and told the bookkeeper that the note was a fraud, so he took the money back.

How much loss did the bookkeeper face?

This is a most unusual paragraph. How quickly can you find out what is so unusual about it? It looks so ordinary, you'd think nothing was wrong with it. Actually, nothing IS wrong with it. But it is not as ordinary as you might think. If you think about it for a bit, you will find out why it is truly so unusual. So what is it? What is so unordinary about this paragraph?

If 21x = 79x, what is the value of x?

In the image below, can you find the value of an angle(y)

Can you find the largest Three-digit number whose sum is 14 and whose square is less than 5,00,000?